Purchase universal testing machine in five aspects

2022-10-01
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Five aspects purchase universal testing machine

first, application scope

electronic universal testing machine is widely used in all kinds of metal, non-metal and composite materials, such as wood, plastic profiles, wires and cables, paper, film, rubber, medicine, food packaging materials, fabrics, etc. to test tensile performance indicators. At the same time, various test data processing software and test aids can be customized according to domestic and international standards provided by users. Digital display electronic universal testing machine is suitable for users who only want force value, tensile strength, compressive strength and other relevant data. If the demand is more complex parameters, choosing microcomputer controlled electronic universal testing machine is a better choice

II. Service performance

electronic universal testing machine, without oil source, is cleaner and easier to use and maintain; Its test speed range can be adjusted, and the test speed can reach 0.001mm/min ~ 500mm/min. The test stroke can be determined as required, which is more flexible; The force measurement accuracy is high, some of which can even reach 0.2%; Small size, light weight, large space, convenient to add corresponding devices to do various material mechanics tests, and truly achieve a multi-purpose machine. CMT series microcomputer controlled electronic universal testing machine produced by Jinan Xulian instrument company can achieve closed-loop control such as load control, strain control, displacement and speed control

hydraulic universal testing machine, limited by the flow of oil source, the test speed is low. Manual hydraulic universal testing machine is easy to operate and cheap, but its control accuracy is low, which is not in line with gb/t 228 at present Standard requirements; The performance of the electro-hydraulic servo universal testing machine is not inferior to that of the microcomputer controlled electronic universal testing machine, except for its low speed and control accuracy; The microcomputer controlled electro-hydraulic servo universal testing machine with load sensor as the temperature rises can also achieve the force value accuracy of 0.5%, and it is more reliable, stable and cost-effective when doing large tonnage material mechanics tests. The waw series microcomputer controlled electro-hydraulic servo universal testing machine produced by Jinan Xulian instrument company complies with gb/t 228 The standard requires that at the same time, the product has the function of rapid drop, and the test efficiency is the same as that of manual operation

III. structural features

the electronic universal testing machine mainly uses the servo motor as the power source, and the lead screw and nut as the executive parts to realize the speed control of the moving beam of the testing machine, and maintain the host machine, oil source and control system. In transmission control, it not only has the transparency and density of glass, but also adopts synchronous toothed belt and servo motor; In force measurement, the electronic universal testing machine adopts load sensors, which has the characteristics of stable transmission and low noise

the hydraulic universal testing machine mainly uses the high-pressure hydraulic source as the power source, and uses the manual valve, servo valve or proportional valve as the control element for control. Ordinary hydraulic universal testing machine can only be loaded manually, which belongs to open-loop control system. Due to the influence of price factors, the force measuring sensor generally adopts hydraulic pressure sensor. The electro-hydraulic servo universal testing machine uses servo valve or proportional valve as the control element to control. The electro-hydraulic servo universal testing machine of Jinan Xulian instrument company uses high-precision load sensor to measure force, with higher accuracy, which can reach level 0.5

IV. the electronic universal testing machine with a cost performance ratio of

300kn or less has more advantages. Liquid DuPont High Performance Materials Division launched a high-performance material compression universal testing machine for 3D printing, which is mainly used for tensile, compression, bending and other mechanical properties tests of metal and non-metallic materials and parts, components and components. Hydraulic universal testing machine is an ideal testing equipment for industrial and mining enterprises, building materials, quality inspection centers, water conservancy and hydropower, bridge engineering, scientific research institutes, and mechanical laboratories of colleges and universities. At present, the hydraulic universal testing machine controlled manually does not meet the standard requirements, so customers are not recommended to buy it. Choosing the electro-hydraulic servo universal testing machine is the best choice. At the same time, the electro-hydraulic servo universal testing machine has single space structure and double space structure. The universal testing machine with double space structure is slightly unchanged due to its operation in the upper space, but the price is low. The universal testing machine in the form of single space structure has low test operation position, conforms to ergonomics, high equipment stiffness, and does not need to lay a foundation. At the same time, the universal testing machine in the form of single space structure can be equipped with double-sided horizontal push clamps, and the jaw for tensile test can greatly improve the service life, and the later use cost is low. General steel enterprise users choose single space structure, which is very important for testing institutions, Single space structure is also a good choice. Compared with the electronic universal testing machine, the price advantage of the electro-hydraulic servo universal testing machine above 300KN is obvious

v. after sales service

the after-sales service of the testing machine is also quite important, because the testing machine is a kind of electromechanical integration equipment, involving machinery, hydraulic pressure, electrical, computer software and other aspects. Any aspect may affect the success or failure of the test and the experience of the test itself. Therefore, when purchasing testing machines, the comprehensive ability of the testing machine enterprise itself, mainly the research and development ability, is very important, because the quality of the equipment or the rationality of the design will affect the operation and the service life of the equipment, including the materials used, hydraulic components, servo motors, etc., but the "comfort" used is determined by the software, and the "accuracy" of the control is determined by the hardware electrical control. Therefore, when choosing a universal testing machine, we should not only consider the price factor, but also consider comprehensively, clarify the purpose of the test, and choose the testing machine

source: mechanical and chemical engineering

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